Google just dropped a game-changing update to NotebookLM, its AI-powered research tool. And it’s got people buzzing about the future of personalized learning and business research.

NotebookLM is Google’s personalized AI research assistant. It has existed in experimental form since 2023, with Google quietly adding powerful new features and capabilities.

Using NotebookLM, you create virtual notebooks where you upload documents, slides, PDFs, websites, and more (up to 500,000 words per source)—and it “instantly becomes an expert in the information that matters most to you,” according to Google.

Today, NotebookLM is powered by Google’s Gemini 1.5 AI model, which analyzes, summarizes, and connects the dots between all your sources.

It’s like having a super-smart research assistant at your fingertips.

But that’s not the only thing turning heads (or perking up ears). NotebookLM now has a new Audio Overviews feature that is one of the coolest AI features we’ve seen in awhile.

Audio Overviews: Your Personal AI Podcast

NotebookLM can now create an “audio overview” of any material you upload, simulating a deep dive conversation into that material between two AI-generated hosts.

What stands out is just how lifelike these two AI-generated hosts sound. Google is clearly leveraging some insane voice generation technology to produce these conversations.

“It is insanely conversational,” says Roetzer. “They use analogies, they use filler words, like it truly sounds like a real conversation and it’s incredibly valuable.”

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